Bomb and arson investigators are looking into the cause of a suspicious fire that damaged a Kansas City home early Sunday.

Firefighters said they were called to the scene of the fire near 54th Street and Wabash Avenue about 5 a.m. after a driver saw smoke coming from the home and reported hearing crackling noises coming from inside.

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Crews said the first floor of the home collapsed into the basement.

Investigators said no one was home when the fire started.

One firefighter had to get stitches after being struck in the mouth by a hose.